I347-AT4 Datasheet, PDF (106/148 Pages) Intel Corporation – Intel® Ethernet Network Connection I347-AT4 Datasheet

I347-AT4—Programmer’s Visible State
4.1.48
Cable Tester Same Pair Impedance Positive Threshold 2 and 3 -
Page 5, Register 27
Bits
15
14:8
7
6:0
Field
Reserved
Same-Pair
Positive
Threshold
110m - 140m
Reserved
Same-Pair
Positive
Threshold
50m - 110m
Mode
RO
R/W
RO
R/W
HW Rst SW Rst
0x0
0x0
0
0x0A
Retain
0x00 = 0 mV,
0x01 = 7.81 mV,...,
0x7F = 992 mv
0x0
0x0
0
0x0C
Retain
0x00 = 0 mV,
0x01 = 7.81 mV,...,
0x7F = 992 mv
Description
4.1.49
Cable Tester Same Pair Impedance Positive Threshold 4 and
Transmit Pulse Control - Page 5, Register 28
Bits
Field
15:14 Reserved
13
First Peak/Last
Peak Select
12
Break Link Prior
to Measurement
11:10
Transmit Pulse
Width
9:8
Transmit
Amplitude
Distance
7
Measurement
Point
Same-Pair
6:0
Positive
Threshold
> 140m
Mode
RO
R/W
R/W
R/W
R/W
R/W
R/W
HW Rst SW Rst
Description
0x0
0x0
0
This register takes effect only if register 23_5.7:6 = 01.
0x0
Retain
0 = First Peak
1 = Last Peak
0x0
Retain
1 = Do not wait 1.5s to break link before starting cable tester
0 = Wait 1.5s to break link before starting cable tester
00 = Full pulse (128ns)
0x0
Retain
01 = 3/4 pulse
10 = 1/2 pulse
11 = 1/4 pulse
00 = Full amplitude
0x0
Retain
01 = 3/4 amplitude
10 = 1/2 amplitude
11 = 1/4 amplitude
If 23_5.7:6 = 00 then
0 = Measure distance when amplitude drops to 50% of peak
amplitude
1 = Measure distance at actual maximum amplitude
0x0
Retain
If 23_5.7:6 = 01 then
0 = Measure distance when amplitude drops below
hysteresis
1 = Measure distance at actual maximum amplitude
If 23_5.7:6 = 1X then this bit is ignored.
0x06
Retain
0x00 = 0 mV,
0x01 = 7.81 mV,...,
0x7F = 992 mv
96